24.2.2013 22:55, Stef Mientki:
On 20-02-13 21:07, robbert wrote:
This basically means, that it is now possible to write Python & PySide
applications that can be installed from standalone APK packages to
non-rooted user devices, just like any other Android application.
Great work! This is what I've been waiting for, for a long time.
I followed your guide for creating a package (not building PySide).
I tried this on two machines, both are able to 'build' a package, and
deploy it to the device. Sadly, both packages give the error:
"Unfortunately, PySideExample has stopped".
(Your precompiled package works nicely)
indeed a great job. !! but ...
I tried to run the pre compiled version on Samsung Note-10 (runs
perfect) and on my Samsung phone S-plus (crashed "Your application
encountered a fatal error and cannot continue").
Compiling the package myself, resulted in the same errors as above
"Unfortunately, PySideExample has stopped".
Any clue what's the problem ?
The PySide & QtComponents in the example package were compiled against
Android API level [1] 14, which corresponds to Android 4.0. Samsung
S-plus is according to what I've found online running Android 2.3, which
corresponds to API level 9. The API levels are only forward compatible,
meaning API 9 should work on device supporting API 14, but not the reverse.
So the next step is to rebuild PySide & Qt Components in the example
with lower API level - if the build succeeds, the resulting package with
these binaries should work from Android 2.3 all the way to 4.2.
And in more general, what are the possibilities to debug these kind of
errors/problems ?
Application startup & the Qt part of the application prints log messages
to the main Android log. This log can be either by an on-device
application [2] or with using the Android debugger (adb) tool over usb
or network connection. If you have installed the Necessitas SDK, it has
adb in the necessitas/android-sdk/platform-tools folder.
Once you Android device is in debugging mode, just run adb on PC like this:
adb shell logcat
And the Android log should show up in the console.
For stdout & stderr from the Python code, check:
/sdcard/pyside_example_log.txt
/sdcard/pyside_example_error_log.txt
If no such log file exists, the application crashed before the C++
wrapper could start the Python interpreter.
thanks,
Stef
Best wishes
Martin Kolman
[1]
http://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels
[2] https://play.google.com/store/apps/details?id=com.nolanlawson.logcat
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